Seamless-tube-drawing bench.



E. c. sEvmNY. l SEAMLESS TUBE DRAWING BENCH.

APPLICATION FILED NOV. 5.1918.

Patented May 6, 1919 3 SHEETS-SHEET L E. c. sEvlGNY. SEAMLESSTUBEDRAWING BENCH.

APPLICATION FILED NOV. 5. |918.

, .PatentedY May 6, 1919.

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E. C. SEVIGNY.

SEAIVILESS TUBE DRAWING BENCH.

APPLICATION man Nov.5.191a.

LSQQ Patented May 6, 1919.

s SHEETS-SHEET 3. 0

EDWARD C. SEVIGN'Y, 0F JACKSDNVILLE, FLORIDA.

SEAMLESS-TUBE-DRAWIN G BENCH.

Specification of Letters Patent.

Patented May 6, 1919.

Application led November 5, 1918. Serial No. 261,312.

To all whom t may concern:

Be it known that I, EDWARD C. SEVIGNY, a citizen of the United States ofAmerica, residing at Jacksonville, in the county of Duval and State ofFlorida, have invented certain new and useful mprovements in'Seamless-Tube-Drawing Benches, of which the following is aspecification, reference being had therein to the accompanying draw ing.

The invention relates to benches and more particularly to benches usedfor drawing .seamless tubes. Benches in use, at the present time,require at least two operators to operate the same. It is one of theobjects of the present invention to provide a bench, wherein the numberof operators may be reduced to a minimum, in fact a bench that can beoperated by one man.

A further objectl of the invention is to 'provide a tube drawing bench,wherein the -tube is grasped by a clamping member at the die, then drawnthrough a die by a movable clamping member to any desired length. alsoto provide means whereby the movable clamping member may be returned toits initial position at any desired time.

A further object of the invention is to provide a tube drawing bench anda tube clamp carried by a carriage, said carriage being provided withmeans whereby the carriage will be moved along the bench by means .of amoving element. and means whereby the carriage may be disengaged, fromthe movingelement and returned to its initial position from any pointalong the bench.

`With the above and other objects in view, the invention resides in thecombination and arrangement of parts as hereinafter set forth, describedand shown in the drawings. it being understood that changes in theprecise en'lbodiment of the invention may be. made within the scope ofwhat is claimed without departing from the spirit of the in vention.

In the drawings:-

Figure l is a side elevation of bench, showing the carriage in the tubedrawing operation.

Fig. 2 is a longitudinal sectional view of the tube drawing bench.showing the carriage in position for starting and the dog in engagementwith the chain.

Fig. 3 is a top plan view of the bench.

the drawing position for Referring to the drawings, the numeral 1designates a. conventional formI of pipe drawing bench. which comprisesthe parallel sides 2 transversely spaced by means of cross pieces 3.said cross pieces may be ot any construction. The sides 2 are providedwith a series of supporting legs 4 Yadapted to be secured to theFlooring of a building or on a base for preventing displacement ot thebench during a tube drawing operation. Rotatably mounted in bearings 5and 6. at the ends of the sides of the draw bench are shafts 7 and 8 andsecured to these shafts b v means of pins 9 are sprockets 10 and 11 andextending around the sprockets 10 and 11 is an endless sprocket chain12. Secured to one cnd of the shaft 7 is a gear 8, also secured to theshaft 7 is a conventional form of pulley 13. to which power may beimparted through a belt or from any suitable means. From the above itwill be seen. that when revoluble movement is imparted to the pulley 13.and sprocket 10, that the sprocket chain 12 will be caused to move inthe direction of the arrow (L. Fig. 2. which movement is a continuousone in this direction at all times.

A conventional form ot' die 14 is mounted in the vertical slot 15 at oneend of the bench and is secured 'therein by means of a set screw 16.however this structure may be of any form that is commonly used at thepresent time.

Slidably mounted and disposed over the sprocket chain 12 is a tubecarriage clamp 17. said carriage being mounted on the upper edges 18 ofthe sides 2 by means of the tianged wheels 19. which rotate on pins 20secured to the sides of the carriage 17. The forward end of. thecarriage is provided with a recess 21 and rotatably mounted on pins 22in said recess are rollers 23 and 24, which act to open and close thetoothed tube clamping jaws 25, of the tube clamp 26. The tube clamp 26comprises two members 27 and 28 which are pivoted and secured togetherby means of a pin 29, the lower end of which moves in an elongated slot31, whilev its upper end extends upwardly through an elongated slot 32,the purpose of which will presently appear'. Pivotally secured to theupper end of the pin 29, as at 33, is a lever 34 which in turn ispivoted at 35 to the cover 36 of the carriage, said cover being securedto the body thereofby means. of screws 37. It will be seen that when thelever 34 is rocked, that the arms 38 of the clamping jaws which engagebetween the rollers 23 and 24 will be caused to open and close accordingto the directionof movement of the lever 34, thereby opening and closingthe jaws 25 lof the tube clamp for grasping or releasing the tube. Achain engaging dog 40 is slidably mounted in an aperture 41, at the rearof the carriage said dog being provided with a recess 42 which isengaged by one of the rollers 43, of the sprocket chain 12 when it isdesired to draw the tube through lthe die 14. Pivotally secured at 44,to the upper end of the post 45, is a rockable lever 46, one end ofwhich is secured to the upper end of the dog 40 as at 47, there being anelongated slot 48 to allow movement of the parts, a pin 49 beingprovided to limit downward movement of the dog 40. The other end of therockable lever 46 is provided with an adjustable weight 49, the purposeof which will presently appear. Ex-

tending upwardly from the carriage 17 is a post 50, which is providedwith an adjustable sleeve 51 whereby the downward movement of theweighted end of the lever 46 maybe limited.

Rotatably mounted :in bearings 52, at the rear end of the bench is ashaft 53, and secured to one end of said shaft 53 is a gear 54, whichmeshes with the gear 8, said gear 8 when rotated imparting revolublemovement to the shaft 53 through the medium of the gear 54. Rotatablymounted upon the end 55 of the shaft 53 is a cable drum 56, which isprovided with a female clutch recess 57, adapted to receive the maleportion of the clutch 58. which is keyed to the end of the portion 55 ofthe shaft. Interposed between the cable drum 56 and the clutch member 58is a coiled spring 58, which keeps the parts normally separated and thecable drum in engagement with a thrust bearing 59. A. sliding clutchcollar 60 is disposed between the thrust bearing and an annular rib 61,on the shaft thereby limiting the inward movement ofthe clutch collar60. These rotating parts carried by the portion of the shaft arelubricated through the medium of the oil slot 62, oil

passage 63 and oil cup 64 thereby thoroughly lubricating the parts atlall times. Secured at 65 to the cable drum is a cable 66, which leadsforwardly through guides 67, thence around the pulley 68, which rotatesupon a pin 69 and the cable end is secured to the end of the lever 34,as at 70.

Secured to the side 2, of the bench is a bearing 71 and verticallymounted in said bearing is the shaft 72, of a clutch operating 75member, said shaft being prevented from vertical movement in its bearingby means of the collars 73, which are pinned thereto. The lower end ofthe shaft 72 is provided v with an arm 74, which terminates in a clutchoperating yoke 75, the arms of which are provided with lugs 76 adaptedto engage a groove 77 of the sliding collar 60. rlhe upper end of thevertical shaft 72 is provided with an arm 78 and to which arm one end ofan operating rod 79 is adjustably connected, said rod 79 extendingforwardly through guide eyes 80 and havingits other end adjustablysecured as at 81, to the arm 82, of the foot lever 83, which is pivotedto one ofthe legs 4, of the side frame 2, as at 84. The arm of the lever83 is provided vwith a foot piece 86 adapted to be engaged bythefoot ofthe operator when it is desired to operate the clutch.

The operation is as follows: When it is desired to draw a tube, thecarriage 17 is in a forward position so that the jaws 25 of the tubeclamp will grasp the tube at the die 14. While in this position the arm34 carrying the clamping members is moved forwardly so that the jaws 24thereof will grasp the tube. The lever 46 being in a down position asshown in Fig. 1 is then pulled upwardly until the dog 40 is enraged byone of the rollers 43, of the endess chain 12, as shown in Fig. 2, aftersaid engagement the carriage 17 will move rearwardly on the bench andconsequently draw the tube through the die 14. When the tube 110 hasbeen drawn to a suflicient length, to disengage the tubefrom theclamping jaws, stop the carriage 17 and return the same to its initialposition, the operator places his foot on the foot lever tread 86,thereby pull- 115 ing the rod 7 9 and consequently rocking the yoke 74.which yoke through the medium of. the sliding member 60. causes thecable drum 56 to he moved longitudinally on the portion 55 of the shaft53, against the action 120 of the spring 58a and into engagement withthe male member 58 of the clutch, which rotates with the shaft. Thisaction causes the winding of the cable 66, on to the cable drum` therebyimparting a. pull upon the 125 arm 34, consequently moving the tubeclamp, as a whole rearwardly and spreading its arms 38 thereby releasingthe tube. After the tube is released. the weight 49 will cause the lever46 to pivot at 44 and raise the 130 Lacasse chain engaging dog l0 out ofengagement with the roller 43, of the endless chain 12. The furtherpulling of the cable 66, returning the carriage 17 to its initialposition for drawing another tube through the die.

From the above operation it will be obvious that a tube drawing bench isprovided,

that will require only one man to operate,` and it will also be seenthat a bench is provided that will draw tubes of any desired length atthe option of theoperator and that the tube drawing clamp and carriage,will be automatically released from the endless chain and returned toinitial position at the option of the operator.

The invention having been set forth, what is claimed as new and usefulis:-

1. A. tube drawing bench comprising a movablel chain mounted in a frame,a carriage mounted 0n said frame and provided with a pair of clampingjaws for grasping and releasing a tube` a lever pivoted on the carriagefor closing and opening said cla1nping jaws, a dog carried by thecarriage and adapted to be moved into and out of engagement with themovable chain, al weighted lever connected to said dog for disengagingthe dog from the movable chain, and means connected to the lever on thecarriage whereby the lever will be rocked, the clamping jaws opened soas to release the tube. the weighted lever allowed to disengage the dogfrom the movable chain and the carriage returned to initial position fordrawing another tube.

A tube drawing bench colnprising a frame having a movable chain therein,a

,carriage mounted on said frame and having a pair of clamping jaws forgrasping and releasing a tube, a lever pivoted on the carriage forclosing and opening saidiclamping jaws.` a dog carried Iby the carriageand adapted to engage and disengage the movable chain, means coperatingwith the dog for disengaging the dog from the chain when the tube isreleased by the clamping jaws. and a cable connected to the pivotedlever on the carriage whereby a pull may be imparted on the cable forrocking the lever and opening the clamping jaw and allowing the meanscoperating with the dog to disengago the dog from the movable chain andthe further pull upon the cable to return thel carriage toinitialposition for drawing another tube.

3. A tube drawing bench comprising a frame having a movable chaintherein, a carriage mounted on the frame and having a. pair ot' clampingjaws for grasping a tube.

a lever pivoted on the carriage for closing and opening said clampingjaws, a dog carriedby the carriage and adapted to engage the movablechain, said dog having a weighted lever connected thereto for releasingthe dog from the movable chain a carriage return cable connected to thepivoted lever, means for imparting a pull upon said cable for rockingthe lever, releasing the tube from the clamping jaws, allowing theweighted lever to disengage the dog from the movable chain and returningtheA carriage to initial position for drawing another tube. A

4. A tube drawing bench comprising a frame having a movable chaintherein, a carriage mounted on said frame and having a pair of clampingjaws for grasping and releasing a tube. a lever pivoted on'the carriagefor closing and opening said clamping jaws, said carriage being providedwith a dog for engaging the movable chain, a weight for disengaging saiddog from said chain, a cable connected to said carriage lever and meansfor imparting a pull upon the cable at any time during the drawingoperation for disengaging the tube Jfrom the clamping jaws, allowing theweight to disengage the dog from the movable chain and returning thecarriage to initial position for drawing another tube. l

5. A tube drawing bench comprising a frame having an endless movablechain mounted therein, a carriage mounted on a raceway and disposed oversaid movable chain, a pair of clamping jaws carried by said carriage forgrasping atube during a drawing operation, a lever pivoted on thecarriage for closing and opening the clamping jaws, a dog carried by thecarriage for engaging the endless movable chain during a tube drawingoperation whereby the carriage will be moved on the raceway, a weightedlever connected to the dog and adapted to disengage the dog from thechain when the tube is released from the clamping jaws, a clutchcontrolled cable connected to the pivoted lever onthe carriage, andmeans for imparting a pull upon the cable the initial pull of which willrock the pivoted lever thereby opening nthe clamping jaws and releasethe tube allowing the weighted lever to disengage the dog from the chainand the further pull upon the cable return the carriage to initialposition for drawing another tube.

lin testimony whereof l hereunto a'ix my signature.

EDWARD C. SEVGNY.

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